STATE POMOLOGICAT, SOCIETY. 95 



Brown rot, apple or pear scab, and pear blight may kill the 

 blossoms. 



Frost injury to blossoms is of all degrees. Even flowers which 

 appear to be uninjured may be so weakened that they cannot set 

 fruit. 



Rain during the blooming season prevents the setting of fruit 

 chiefly by destroymg the vitality of the pollen, injuring the 

 stigma, or by preventing fertilization because of the low tempera- 

 ture. The washing of pollen from the anthers seldom causes 

 serious loss. 



Insects are probably more important than wind for carrying 

 pollen from tree to tree. — Extracts from bulletin of Cornell Uni- 

 versity Bxperiment Station. 



